James Collins has issued a bullish message ahead of Saturday's Euro 2012 qualifier, claiming that Fabio Capello and his England players should be "worried" about the prospect of facing a Wales side that includes Gareth Bale, Craig Bellamy and Aaron Ramsey.

Collins believes the rare availability of the three stellar names of Welsh football, allied to an intimidating atmosphere at the Millennium Stadium, will make life uncomfortable for England. It is the first time that the venue has been sold out for an international football match since the two nations met six years ago, when England triumphed 1-0, although Collins expects Wales to carry a much greater threat on this occasion.

"It will be a completely different game this time, with the players we've got going forward," said Collins, who is expected to be fit after struggling with a calf problem and is also likely to be named as the new Wales captain. "With Gareth Bale and Craig Bellamy on the wings, we know that's our strength. We've got to take the game to them. We'll work on that in training, on attacking them. If you sit back they're good players and a good team; they will punish you so we are certainly going to have a right go at them.

"I think they will be quite worried; our attacking players are as good as any team around. They are certainly going to be cautious and a full house in the Millennium Stadium will be an intimidating atmosphere for them. I didn't train [on Tuesday] fully but I watched from the sidelines and the boys are looking as sharp as I think I've seen a Wales training session."

Glenn Hoddle, a former England player and manager, has already expressed doubts about how the younger members of Gary Speed's squad will handle playing in front of a capacity stadium at the Millennium Stadium, but Collins believes the crowd will be a help and not a hindrance to his team. "You can't be daunted if it is the majority of Welsh fans behind us wanting us to beat the English," he said. "The boys have not got to be worried; just get out there and concentrate on the job."

There is certainly a sense that Speed's appointment as manager has been welcomed by most of the squad after the John Toshack years. "Just being around the place you can tell the professionalism and the way things have changed for the better," Collins said. "It is more of a club atmosphere, how we are preparing for training and the game. Intensity, organisation and enthusiasm in training, it all seems to have gone up. It's been great."

Collins admitted that international duty has provided some welcome respite from a "difficult couple of weeks" at his club, Aston Villa, where he was fined two weeks' wages for his part in a drunken row during a team-bonding session.

"Obviously it wasn't great," he said. "It's not something I want to go into at the minute. I want to come away and focus on one thing and that is getting three points for Wales against England."